
Postio.co.uk
Ideal postcodes
Fetchify
Smarty
Data8 UK
ZIP Code API
Data8 UK PredictiveAddress
The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.

Decidim
Prioneer.io
Loomio
Consul
Jina Rationale
Typeform
Polis
Online voting system (german & english) for Interactive Democracy, which is used by the Pirate...

Which is more popular?
Based on our record, LiquidFeedback seems to be more popular. It has been mentioned 4 times since March 2021.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | postaldatapi.com | liquidfeedback.com |
| Pricing | — | |
| Company | Startup from the United States · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


PostalDataPI is a global postal code validation and enrichment API covering 240+ countries and territories. One API, one key, one flat rate — $0.000028 per query with no tiers or subscriptions. What you get back: Up to 18 metadata fields per postal code — city, state/region, coordinates,...
No description of LiquidFeedback yet.
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of LiquidFeedback yet.
Walkthroughs and reviews on video.
PostalDataPI Now Returns 18 Fields Per Postal Code — for 240+ Countries
More videos
LiquidFeedback 101
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using PostalDataPI and LiquidFeedback. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Tracking PostalDataPI since Apr 2026.
An implementation of Liquid Democracy is Liquid Feedback, which the Pirate Party Germany uses Internally. Source: almost 4 years ago
There is also Liquid Feedback though I've never seen a live demonstration. Source: almost 5 years ago
Not yet but I'm hopeful about ideas like liquid democracy https://liquidfeedback.com/en/. - Source: Hacker News / about 5 years ago
When comparing PostalDataPI and LiquidFeedback, you can also consider the following products.

Fast UK address, email & phone validation APIs for developers. Official Royal Mail PAF data. Pay as you go, 100 free lookups.
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Free Open-Source participatory democracy for cities and organizations
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We help businesses improve UX and data quality with a cutting edge address validation service.
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Prioneer is a stack ranking tool. Get people's priorities · Research customer pain points · Make team decisions · Create beautiful ranking surveys in 1 minute!
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Fetchify delivers fast, accurate address, email, phone and bank validation tools that help businesses capture clean, verified customer data, reduce failed deliveries and improve checkout experiences worldwide.
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Loomio helps groups of people make decisions together, online.
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